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Negate counts in COUNTIFS?

I was wondering if you can negate counts in a COUNTIFS?
Example:

=COUNTIFS(A:A,A2,B:B,B2,C:C,C2)
My formula is looking in all of column A (or Agent) with "John" as the Criteria.
My formula is looking in all of column B (or Day) with "Monday" as the Criteria.
My formula is looking in all of column C (or Time) with "18:00" as the Criteria

Outcome:
My formula works, it finds 3 instances of John, Monday and 18:00. However, what I would like is for the COUNTIFS to search an entire column like I have but if there are duplicates to some how have an end calculation of 1.

I would like this outcome with a result of 3:
=COUNTIFS(A:A,A2,B:B,B2,C:C,C2)

Agent

Day

Time

Formula

John

Monday

18:00

3

John

Monday

18:00

John

Monday

18:00

To look like this with a result of 1, with a COUNTIFS function if possible:
=COUNTIFS(A:A,A2,B:B,B2,C:C,C2)???

Re: Negate counts in COUNTIFS?

That's good but my issue is the days and time frame are also import. Think of John like a supervisor so his name could be duplicated 15 times or more based on people that work under him. Think of the Day and Time to be coaching times. A match with 15 instances would return 1, because of 1 supervisor named John.

However, back to your original example grid.
You listed 4 time frame examples with some that have duplicates but overall 4 unique time frames.

There might be 3 John, Monday, 1800 listed but overall that is still just 1 time frame, that's what I'm trying to accomplish. Perform the countifs, duplicates might be found, negate the duplicates to represent what was found as a 1 instead 2, 3, 5, 8 or whatever amount of duplicates could be listed.

Re: Negate counts in COUNTIFS?

Originally Posted by KuraiChikara

That's good but my issue is the days and time frame are also import. Think of John like a supervisor so his name could be duplicated 15 times or more based on people that work under him. Think of the Day and Time to be coaching times. A match with 15 instances would return 1, because of 1 supervisor named John.

There might be 3 John, Monday, 1800 listed but overall that is still just 1 time frame, that's what I'm trying to accomplish. Perform the countifs, duplicates might be found, negate the duplicates to represent what was found as a 1 instead 2, 3, 5, 8 or whatever amount of duplicates could be listed.

This still is not clear to me, can you just post what your expected results should be? Or is it what you show above?